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The influence of unsteady aerodynamics on hingeless rotor ground resonance
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Johnson, W. |
| Copyright Year | 1981 |
| Description | Calculations of the model frequency and damping for a hingeless rotor on a gimballed support in hover are compared with measured results for two configurations (differing in blade flap stiffness). Good correlation is obtaned when an inflow dynamics model is used to account for the influence of the unsteady aerodynamics. The effect of the unsteady aerodynamics is significant for this rotor system. The inflow dynamics model introduces additional states corresponding to perturbations of the wake-induced velocity at the rotor disk. The calculations confirm the experimental observation that the inflow mode introduced by these additional states is measurable for one configuration but not for the other. |
| File Size | 1058497 |
| Page Count | 46 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19810019518 |
| Archival Resource Key | ark:/13960/t6f23s80d |
| Language | English |
| Publisher Date | 1981-07-01 |
| Access Restriction | Open |
| Subject Keyword | Aerodynamics Aerodynamic Configurations Ground Resonance Rigid Rotors Unsteady Aerodynamics Resonant Vibration Rotor Aerodynamics Aerodynamic Stability Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
